<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
	<style>
		.id{
			width:0px;
			height:0px;
			border-width:60px;
			border-style:solid;
			border-color:transparent transparent blue transparent;
			border-top-width: 0px;
		}
		.id1{
			width:100px;
			height:30px;
			background-color:red;
			border-width:50px;
			border-color:blue transparent  ;
			border-style:solid;
			border-bottom-width:0px;
			float:right;
		}
		.id4{
			width:100px;
			height:40px;
			margin:0 auto;
		}
		.id2{
			width:100px;
			height:40px;
			background-color:yellow;
			

		}
		.id3{
			width:0px;
			height:0px;
			border-width:10px;
			border-style:solid;
			border-bottom-width:0px;
			float:left;
			border-color:red transparent  transparent  transparent;

		}
	</style>
</head>
<body>
	<div class="id"></div>
	<div class="id1"></div>
	
	<div class="id4">
		<div class="id2"></div>
		<div class=" id3"></div>

	</div>
</body>
</html>